Physics, asked by Madhurrathi6232, 8 months ago

Three charges of +q ,+q ,-q are placed on the corner of an equilateral triangle then the electrostatic potential at the centroid of the triangle will be

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Answered by nidhitikku888
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Explanation:

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12th

Physics

Electric Charges and Fields

Coulomb's Law and Its Applications

Three charges - q, + q and...

PHYSICS

Three charges −q,+q and −q are placed at the corners of an equilateral triangle of side a. The resultant electric force on a charge +q placed at the centroid O of the triangle is:

January 17, 2020

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Rajarshi Baranwal

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VIDEO EXPLANATION

ANSWER

cos30

0

=

2x

a

x=

2

3

2a

x=

3

a

The net force on x axis is cancelled by the below two (−q) charges.

∴ Force on y axis adds up

F

y

=

(

3

a

)

2

k(q)(q)

+

(

3

a

)

2

k(q)(q)

×cos60

0

×2

F

y

=

a

2

3kq

2

+

a

2

3kq

2

F

y

=

a

2

6kq

2

F

y

=

4a

2

πε

0

6q

2

=

2a

2

πε

0

3q

2

solution

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